It's a bit low on life at the moment. I plan on getting + 24% max life in the next few levels.
The crit chance is good enough. The damage is descent enough. The crowd control is awesome.
I have very few survivability issues. Some casters and large groups of monsters can be a pain to deal with but it can be done with a bit of kiting. Melee attackers don't stand a chance.
I have one point saved for EB. I'm waiting for the moment when I get a good enough Cloak of Defiance.

You're build did pretty good as far as health, i would focus on getting more as you go. As a spell caster having a bit more life and mana regen might be more important then getting shaper. Going into the witch tree would allow getting more mana regen and more life. I move a little bit of the points around to get the stronger shadow crit nodes.

Otherwise the build looks really good, again focusing on life will be key, reflect is probably going to be a problem, some way to mitigate reflect would be wise.

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